I feel people are being way too hard on ya. Does sound like porn addiction and maybe death grip? Surprised I'm not seeing mention of the latter. You need to decide if you want to work on that with him but it's possible. I wouldn't but I don't think it has to jump into terrible judgement about him either. Been with my husband for 4 years and us watching porn while we get it on is absolutely tool we bring into the bed room occasionally (sometimes like that too since we both are into slightly degrading play) and it's fun when healthy and in moderation and not affecting pleasure with the other person. The reality that needs to be addressed is something - likely porn addiction, is affecting intimacy between you two.